Fire Pumpsets: Selection, Testing and Maintenance for Commercial Buildings
- EverSure Fire
- 3 days ago
- 9 min read
When a fire alarm activates and Fire and Rescue NSW crews connect to your building's hydrant system, everything depends on one thing: water pressure.
If the mains supply isn't sufficient and in most multi-storey commercial buildings, it isn't that pressure comes from your fire pumpset. It's the last line of defence between a contained fire and a building engulfed. And yet, the pump room is often the most overlooked space in a building's fire safety programme.
According to recent technical audits across the Illawarra and Greater Sydney regions, roughly 25% of diesel fire pumps in buildings over 15 years old fail to start automatically during a simulated pressure drop test. One in four — in a system that exists specifically to activate when everything else is on fire.
This guide covers what fire pumpsets are, which type your building needs, the applicable Australian Standards, and what a compliant maintenance programme actually looks like in 2026.
What is a fire pumpset?
A fire pumpset is a dedicated pumping system installed to boost water pressure and flow rate to fire hydrant and sprinkler systems when the municipal water supply pressure isn't sufficient to meet the design requirements of those systems.
AS 2941:2013 is the Australian Standard that specifies the mandatory requirements for designing, constructing, installing, and maintaining fire pumpsets in fixed fire protection systems. Compliance ensures fire pumps deliver the necessary flow rate, pressure, and reliability during emergencies.
A typical commercial fire pumpset consists of:
A main pump (diesel or electric)
A jockey pump (pressure maintenance pump)
A controller panel
A water supply connection (tank or mains)
Associated pipework and valves
A test facility allowing flow testing without discharging water externally
Every component has a defined function. Every component can fail. That's why the maintenance programme matters as much as the original installation.
The three pump types
Diesel fire pump
The diesel pump is the primary pump in most commercial and high-rise buildings. Its critical advantage is independence from mains power — it starts and runs on its own fuel supply even if the building loses electricity during a fire.
Diesel fuel tanks must hold enough fuel for at least 6 hours of continuous operation at full load under AS 2941:2013, allowing the pump to sustain operation through an extended incident without refuelling.
Under AS 2941, a fire pump must start automatically without human intervention the moment a pressure drop is detected. This isn't optional — it's a fundamental design requirement. Any modification that prevents automatic starting, including manual interventions by maintenance contractors trying to stop "nuisance starts," is a critical non-compliance.
Electric fire pump
The electric pump provides the rated flow and pressure for hydrant and sprinkler systems when connected to a reliable power supply. In many buildings, the electric and diesel pumps work in tandem — electric as primary, diesel as the backup that takes over if power fails.
Diesel pumpsets must run for a minimum of 90 minutes during shop testing at 130% duty flow; electric pumpsets must run for 15 minutes, under AS 2941:2013. These acceptance test requirements confirm the pump can deliver its rated performance before installation.
Jockey pump (pressure maintenance pump)
The jockey pump is a small, continuously running pump that maintains system pressure when the main pumps aren't running. It compensates for minor pressure drops from leaks, valve movements, or small fluctuations without triggering the main pumps unnecessarily.
The jockey pump's behaviour is your first diagnostic indicator of system health. A jockey pump that cycles frequently, runs continuously, or fails to hold pressure is telling you there's a leak or fault in the system. That signal should never be ignored.
When does your building need a fire pumpset?
Not every building requires a dedicated fire pumpset. The need is determined by the hydrant and sprinkler system design requirements relative to the available water supply.
AS 2419.1:2021 sets the flow and pressure requirements for hydrant systems. Full-duty pumps deliver 10 L/s per hydrant outlet; half-duty pumps deliver 5 L/s per outlet. Buildings over 50 metres effective height require full-duty pumps at 10 L/s per outlet, and buildings over 25 metres effective height require two pumps for redundancy.
In practice, most commercial buildings taller than three or four storeys, most buildings with sprinkler systems covering significant areas, and most buildings where mains water pressure is variable or insufficient will require a fire pumpset.
If your building has a fire pumpset listed on its Fire Safety Schedule, that pumpset is an essential fire safety measure — and its maintenance is a legal obligation under the EP&A Act and AS 1851-2012.
The maintenance schedule: what AS 1851-2012 and AS 2941 require
AS 1851 specifies maintenance and testing frequencies covering monthly automatic and manual start tests, six-monthly diesel engine and controller checks, and annual flow and pressure assessments. AS 2941 defines the technical design, installation, and performance requirements, including the five-yearly internal inspection of pump components. Compliance with both standards is mandatory under the Building Code of Australia and the Environmental Planning and Assessment Act 1979.
Weekly testing
A weekly fire pump test confirms the pump starts correctly on both automatic and manual signal, runs at rated speed for a minimum of 30 minutes, produces adequate suction and discharge pressure, and that all supporting systems — diesel engine, jockey pump, controller alarms, suction tank — are functioning. It takes approximately 30 to 45 minutes and should be performed by a competent person familiar with the installation.
Weekly testing is one of the most frequently deferred maintenance obligations we see. Building managers assume it's handled by the fire safety contractor; the contractor assumes it's handled by on-site facilities staff. The gap is where non-compliance lives.
Monthly testing under AS 1851-2012
Monthly inspection tasks include automatic and manual start testing of all pumps, verification of controller status and alarm indicators, fuel level and quality assessment for diesel units, suction tank water level verification, jockey pump cycling behaviour assessment, and logbook entry with pass/fail results.
Six-monthly service
A more detailed inspection covering diesel engine condition, cooling system, battery condition and load testing, fuel filter and air filter inspection, controller functional test, valve position verification, and physical inspection of the pump room for leaks, corrosion, and access compliance.
Annual service
Key additions over the weekly test include a full flow test at rated conditions, performance curve measurement at multiple flow points (shutoff, 50%, 100%, 150% of rated flow), comparison to original acceptance test data, impeller and wear ring inspection, full diesel engine service, battery load test, transfer switch testing, full electrical testing, and jockey pump service. It takes approximately 4 to 6 hours.
The comparison to original acceptance test data is critical. A pump that passes a basic start test but delivers less than its rated flow is non-compliant — and that gap is only detected through annual performance curve testing.
Five-yearly internal inspection
AS 2941 requires a five-yearly internal inspection involving partial or full disassembly of the pump head, inspection of the impeller, wear rings, shaft seal, and bearings, and assessment of internal corrosion. For diesel engines, this typically includes a more comprehensive mechanical overhaul.
The NSW 2026 baseline data requirement
This is the specific change that catches many building owners off guard.
Before February 2026, many fire pump maintenance programmes amounted to a start test and a visual inspection. The pump started, the technician ticked the box, and the AFSS was signed.
That's no longer sufficient. Under the EP&A Regulation 2021, you must verify that your current system performance matches the original commissioning baseline established under AS 2941. Your records need to show not just that the pump started, but that it delivered the correct flow rate and pressure at the correct point on its performance curve and that those results are consistent with the data recorded at commissioning.
If you don't have your original commissioning data, you'll need to establish a new baseline through a full performance test. This becomes the starting point from which all future annual assessments measure degradation.
Common failures and warning signs
After two decades of fire pumpset servicing across Sydney, these are the failure modes we encounter most regularly:
Failure to start automatically. The most critical failure, and the most common in older diesel units. Causes include faulty pressure switch calibration, corroded or seized controller contacts, flat or degraded batteries, and — most insidiously — manual override switches left in the wrong position after maintenance. Sometimes accidental, sometimes deliberate to prevent nuisance starts. Either way, it's a critical non-compliance.
Reduced flow and pressure at annual test. Can result from impeller wear, internal corrosion, incorrect speed settings, or restrictions in the pipework. Reduced output directly compromises system performance.
Jockey pump running continuously. Indicates a leak in the system — a valve, a joint, a sprinkler head, or the pump seals themselves. A running jockey pump is a diagnostic signal, not a nuisance.
Diesel fuel degradation. Diesel stored for more than 12 months degrades and can cause injector fouling, filter blocking, and engine failure on start. Annual fuel testing and periodic replacement is not optional for buildings that rarely use their diesel pump.
Pump room access and environmental compliance. The pump room must stay within the temperature and humidity range specified in AS 2941. Blocked ventilation, water ingress, and vermin damage are common in pump rooms treated as storage overflow.
Missing or incomplete logbooks. The AS 1851-2012 on-site logbook requirement applies fully to fire pumpsets. Every weekly test, monthly inspection, six-monthly service, and annual test must be documented with results, dates, technician details, and defect notes. A pump room without a current logbook is a non-compliance in its own right.
What your AFSS practitioner needs to see
When an Accredited Practitioner (Fire Safety) assesses your fire pumpset for the Annual Fire Safety Statement, they need to verify:
The pump starts automatically on pressure drop signal and manually from the controller
The jockey pump maintains system pressure and cycles normally
All controller indicators are in the correct state, with no faults or active bypass switches
The on-site logbook is current, complete, and shows testing at the correct frequencies
Annual performance test results demonstrate the pump is delivering its rated flow and pressure
The diesel fuel tank holds sufficient, quality-verified fuel
The pump room is in good condition, properly ventilated, with maintained access
A pumpset that fails any of these checks is a critical defect. An AFSS cannot be signed off for a building where the primary means of delivering water to hydrants and sprinklers is non-functional.
Choosing the right maintenance partner
Fire pumpset maintenance sits at the intersection of fire safety compliance, hydraulic engineering, mechanical servicing, and electrical systems. It's one of the most technically demanding aspects of fire safety maintenance and one of the easiest to shortcut with inadequate servicing.
When selecting a contractor, verify they hold the appropriate electrical and mechanical licences for pumpset servicing, that they have access to calibrated flow testing equipment capable of producing a full performance curve, that they can provide AS 2941 compliance certificates as part of the annual service, and that their servicing records include actual measured values, not just pass/fail ticks.
Frequently asked questions
Does every building need a fire pumpset?
No. The need depends on hydrant and sprinkler design requirements relative to available mains water pressure. If a fire pumpset is listed on your Fire Safety Schedule, it's an essential measure that must be maintained under AS 1851-2012.
What's the difference between a diesel and electric fire pump?
Diesel pumps run independently of mains power, making them the primary choice for high-rise and commercial buildings. Electric pumps rely on a reliable power connection and are often paired with a diesel backup.
Why does my jockey pump keep cycling?
Frequent cycling or continuous running usually indicates a leak somewhere in the system — a valve, joint, sprinkler head, or the pump seals. It should be investigated, not ignored.
What changed with AS 1851-2012 in February 2026?
Building owners must now verify that current pump performance matches the original commissioning baseline under AS 2941, not just confirm the pump starts. Without commissioning data, a new baseline test is required.
How long should a diesel fire pump take to start?
Under AS 2941, the pump must start automatically the instant a pressure drop is detected — there is no acceptable delay built into the design requirement.
Don't wait for the annual test to find out
A fire pumpset that starts on a basic check can still be failing the building it's meant to protect. The only way to know for certain is a full performance test against your original commissioning baseline.
EverSure Fire Protection services and maintains fire pumpsets — diesel, electric, and jockey — across commercial, industrial, and strata properties throughout Greater Sydney. Our technicians are qualified, our test equipment is calibrated, and our records are structured to meet the AS 1851-2012 documentation requirements.
Request a pumpset assessment
📞 02 8212 4801
Disclaimer: This article provides general information about fire pumpset selection, testing, and maintenance in Australia as of June 2026. It is not engineering advice. Fire pumpset design, installation, and maintenance must be carried out by qualified, licensed professionals. Always verify current requirements with a hydraulic engineer and an Accredited Practitioner (Fire Safety).
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